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Posts: 3,617 | Thanked: 2,410 times | Joined on Nov 2009 @ Cambridge, UK
To check whether it's a CA certificate, look at the certificate in Firefox. In the Certificate Fields, look for the Extensions section and the Certificate Basic Constraints field. If you select that, it should say "Is a Certificate Authority".

To Export from Firefox I think you just want the single certificate (not the chain). It should work by just exporting the very top certificate in the hierarchy, but may require each of the CAs in the hierarchy exporting separately.

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